The act of staying late at work, or doing any undesirable task that your boss/supervisor couldnt give you 3-4 hours ago, because he was doing nothing, just as you're about to punch out. The boss refers to you as "bro".

Exployee: "Man, I was so close to leaving yesterday and then I got bro'd for 2 hours."

Boss: "Hey bro, hold up, I got somethin' for ya"

"So you have to sort all the TPS reports? Bummer"
"Yeah, it's a real bro-job."

"How many of you fucks are staying late tonight?"
"Enough to give the King Bro his bro-ner."